Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems September class, title,number 09/09

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
09/24/2009 > patent applications in patent subcategories.

20090237959 - Digital control of power converters: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, a digital pulse generator, and a pre-driver to control the power converter. Another embodiment also includes a digital filter as part of the control loop that may... Agent: Slater & Matsil, L.L.P.

20090237960 - Switch mode power supply controllers: This invention relates to SMPS controllers employing primary side sensing. We describe a system for identifying a knee point in a sensing waveform, at which the output voltage of the SMPS may be sampled accurately on the primary side. The system identifies the knee point by fitting a tangent to... Agent: Schwegman, Lundberg & Woessner, P.A.

20090237961 - Inverter: The inverter comprises a diode bridge (21) that rectifies an inputted three-phase AC voltage into a DC voltage, an inverter section (22) that converts the DC voltage converted by the diode bridge (21) into an AC voltage and outputs the resulting voltage, an LC filter that has an inductor Ldc... Agent: Birch Stewart Kolasch & Birch

20090237962 - Multi level inverter: The present invention relates to a multilevel inverter comprising: a converter unit converting an inputted AC power source to a direct current (DC) power source; a film capacitor rectifying the DC power source converted by the converter unit; an inverter unit converting the rectified DC power source to a three-phase... Agent: Lee, Hong, Degerman, Kang & Waimey

20090237964 - Method for operating a converter circuit and apparatus for implementing the method: A method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are... Agent: Buchanan, Ingersoll & Rooney PC

20090237963 - Ups frequency converter and line conditioner: Systems and methods disclosed herein monitor and control input to a converter in one or more of a UPS, a frequency converter, or a line conditioner. Distortion due at least in part to ripple voltage can be removed from a control signal that controls input current to the converter. The... Agent: Lando & Anastasi, LLP

20090237965 - Semiconductor device for switching power supply control, startup circuit, and startup method for switching power supply device: A semiconductor device for switching power supply control limits the startup current supplied from a high-voltage input terminal, and prevents heat generation and combustion in case of an anomaly. A high-voltage input terminal is connected to the main winding of a transformer, and is supplied with a startup voltage upon... Agent: Rossi, Kimms & Mcdowell LLP.

20090237966 - Digital control of power converters: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse... Agent: Slater & Matsil, L.L.P.

20090237967 - Power factor correction circuit with buck and boost conversions: A power factor correction circuit with buck and boost conversions has a rectifying circuit, a buck circuit and a boost circuit. When an input AC voltage of the power factor correction circuit is a relative low voltage, the AC voltage is converted to low level voltage by the buck circuit... Agent: Cooper & Dunham, LLP

20090237969 - Controller ic, dc-ac conversion apparatus, and parallel running system of dc-ac conversion apparatuses: A DC power source voltage is supplied to a center tap of a primary winding, and first and second semiconductor switches alternately turned on are disposed between each of both ends of the primary winding and a common potential point, and a current flowing through a load is fed back... Agent: Morgan Lewis & Bockius LLP

20090237968 - Power inverter and method: An apparatus and method for converting an input signal to an output AC signal in which the input voltage signal is inverted and modulated to provide an intermediate AC signal having twice the desired output frequency. The intermediate signal is then full-wave rectified and then the polarity of the rectified... Agent: Ogilvy Renault LLP (pwc)

09/17/2009 > patent applications in patent subcategories.

20090231883 - Dc-dc converter: A DC-DC converter includes: a first series circuit in which a resonance reactor, a primary winding of a transformer, and a switching element are connected in series, the first series circuit being connected to both ends of a direct current power supply; a second series circuit in which a first... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090231885 - Integrated transformer and power supply using the same: There are provided an integrated transformer in which a power conversion transformer and an inductor for stabilizing output power by the transformer are integrated into one transformer structure, and a power supply using the same. An integrated transformer according to an aspect of the invention includes: a core part including:... Agent: Lowe Hauptman Ham & Berner, LLP

20090231884 - Switching power supply device using current sharing transformer: In accordance with the present invention, the switching power supply device using a current sharing transformer includes an inverter switching unit for switching an input voltage; a share inductor for classification connected to the inverter switching unit for distributing a current applied by the inverter switching unit; first and second... Agent: Lowe Hauptman Ham & Berner, LLP

20090231886 - Power supply and bootstrap circuit thereof: A power supply and a bootstrap circuit thereof are provided. The bootstrap circuit includes a transistor, a first capacitor, a first impedance and a regulator circuit. The collector and the emitter of the transistor respectively serve as the input terminal and the output terminal of the bootstrap circuit. A terminal... Agent: J C Patents, Inc.

20090231887 - Parallel-connected resonant converter circuit and controlling method thereof: The configurations of a parallel-connected resonant converter circuit and a controlling method thereof are provided in the present invention. The proposed circuit includes a plurality of resonant converters, each of which has two input terminals and two output terminals, wherein all the two input terminals of the plurality of resonant... Agent: Volpe And Koenig, P.C.

20090231888 - Method and apparatus for fault detection in a switching power supply: Techniques are disclosed to detect a fault in the feedback circuit of a switching power supply while the power supply operates in a mode where the output is below its regulated value. The power supply delivers maximum power at a given switching frequency without a feedback signal while the output... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090231890 - Boost converter input ripple current reduction circuit: A boost inductor value reduction circuit is integrated into a traditional boost power converter to greatly reduce undesirable high frequency harmonics from being fed back to the input side of the boost power converter. The boost inductor value reduction circuit is very small when compared with traditional filter techniques, is... Agent: General Electric Company Global Research

20090231889 - Method and apparatus for ac to dc power conversion with reduced harmonic current: A method and apparatus are disclosed for controlling a buck converter. In one aspect, an integrator is coupled to receive a current sense signal representative of a current in a switch of the buck converter and to integrate the current sense signal to produce a first input signal. A ramp... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090231891 - Reactor arrangement for alternating electrical current: A reactor arrangement for alternating electrical current includes different coils (105, 107) for positive and negative half-cycles of the alternating electrical current. The negative and positive half-cycles of the alternating electrical current are directed to the different coils with the aid of unidirectional electrical components (106, 108) such as, for... Agent: Young & Thompson

20090231892 - Uninterruptible power supply: An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of... Agent: Lando & Anastasi, LLP

20090231893 - Single-phase full bridge boost converter systems and methods: Single-phase full bridge boost converter systems and methods are provided. One system includes a direct-quatrature (D-Q) control system configured to generate a control voltage (vcon) including direct-phase and quadrature-phase voltage components. The system also includes a comparator configured to compare vcon to a carrier waveform voltage, generate switching commands based... Agent: Ingrassia Fisher & Lorenz, P.C. (gm)

20090231894 - Power converter and driving method thereof: In a power converter, a primary coil receives an input voltage, and a switch includes a first electrode, a second electrode coupled to the primary coil, and a control electrode. An output unit includes a secondary coil, and outputs an output voltage. The primary coil and the secondary coil form... Agent: Sidley Austin LLP

20090231895 - Rectifier circuit: Disclosed is a method for operating a transistor as a rectifier element, and a circuit arrangement including a control circuit and a transistor.... Agent: Slater & Matsil LLP

20090231896 - Converter circuit for switching a large number of switching voltage levels: A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional power semiconductor switch and capacitor. The first drivable bidirectional... Agent: Buchanan, Ingersoll & Rooney PC

09/10/2009 > patent applications in patent subcategories.

20090225569 - Multilevel power conversion: A power converter comprises at least one high-frequency link having a primary winding and at least one secondary winding. At least one primary circuit is connected to each primary winding and is operable to apply the voltage of at least one capacitive element to the primary winding. At least one... Agent: Todd Begalke

20090225570 - Twelve-pulse hvdc transmission: A device for transmitting electric power between alternating voltage networks includes converters interconnected by direct current lines and provided each with several six-pulse conversion bridges. The six-pulse conversion bridges of one same converter are capable of being connected to an alternating voltage network associated with the converters via inductances differently... Agent: Lerner Greenberg Stemer LLP

20090225571 - Mitigation of unbalanced input dc for inverter applications: Mitigating the DC content of an AC output from an inverter is important for electrical system reliability. The inverter may be powered by unbalanced DC inputs while still mitigating the DC content of the AC output wavefrom. The present invention provides methods to mitigate the DC content in the output... Agent: Honeywell International Inc. Patent Services

20090225572 - High voltage full bridge circuit and method for operating the same: A circuit apparatus for providing an AC voltage to a load. The apparatus may include: a first, second, third and fourth switch, wherein the first switch is connected between a first node and a first terminal of the second switch and the fourth switch is connected between a second node... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20090225573 - Stable power supplying apparatus: A stable power supply apparatus in accordance with the present invention comprises a secondary battery, a bidirectional chopper circuit and a bidirectional converter, wherein the secondary battery, the chopper circuit and the converter are connected in this order in the direction from the secondary battery side to a system bus... Agent: Pearne & Gordon LLP

20090225574 - Method and apparatus for a leakage energy recovery circuit: A method and apparatus for recovering leakage energy during DC power to AC power conversion. The apparatus comprises a leakage energy recovery circuit for storing leakage energy from a transformer and selectively coupling stored leakage energy to an input of the transformer.... Agent: Raymond R. Moser Jr., Esq. MoserIPLaw Group

20090225575 - Universal ac adaptor: A method and apparatus for adaptively configuring an array of voltage transformation modules is disclosed. The aggregate voltage transformation ratio of the adaptive array is adjusted to digitally regulate the output voltage for a wide range of input voltages. An integrated adaptive array having a plurality of input cells, a... Agent: Fish & Richardson P.C.

20090225576 - Data and power system based on cmos bridge: A signal processing circuit includes an input inverter and an output inverter. Each inverter has a signal input for receiving an input rectangular signal, a signal output for providing an inverted output rectangular signal, and a pair of voltage outputs for developing a rectified dc output voltage. A first circuit... Agent: Bromberg & Sunstein LLP

20090225577 - Power converter: A power converter includes a base plate having thereon a switching device, and positive and negative conductors respectively including main portions disposed parallel to the base plate. One of the main portions is placed over the other of the main portions. The main portions are disposed adjacent to and parallel... Agent: Woodcock Washburn LLP

20090225578 - Semiconductor device and electric apparatus: The present invention provides a semiconductor device and an electric apparatus each of which can realize both high-speed switching operation and energy loss reduction and excels in resistance to current concentration based on a counter electromotive voltage generated by, for example, an inductance load of the electric apparatus. A semiconductor... Agent: Mcdermott Will & Emery LLP

09/03/2009 > patent applications in patent subcategories.

20090219736 - Voltage redoubling circuit: A voltage redoubling circuit, wherein said circuit relies on a voltage-detecting unit, an oscillating unit, an inversing unit, a first switching device, a second switching device, a third switching device, a fourth switching device, and a fifth switching device to pump a reference voltage to an output voltage. In such... Agent: Wpat, PC

20090219737 - Transmission system and a method for control thereof: An HVDC transmission system including a rectifier station and an inverter station each having a series connection of at least two converters. A by-pass DC breaker is connected in parallel with each converter. A control device is adapted to deblock a blocked converter by starting to control the converter at... Agent: Venable LLP

20090219738 - Power supply device, in particular for redundant operation with a plurality of further power supply devices connected in parallel on the output side: A power supply device has an input for an AC input voltage or for a DC input voltage and an output for a load-dependent DC output voltage electrically isolated therefrom. A step-up converter is connected to the input side, a charging coil, a first switching element, a freewheeling diode, a... Agent: Siemens Corporation Intellectual Property Department

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